Loose torque converter bolts and cracked flex plates. Xdp carries all the parts and accessories you need for the best diesel performance. Loud knocking sound from torque converter or flywheel. I checked the flex plate bolts and they are tight and the flexplate looks just fine.
If the flywheel flex plate is vibrating, it can cause a momentary loss of crank sensor data to the pcm. Buy prw 1835910 xtreme duty sfirated internal balance 152 teeth steel flexplate for dodge cummins 5. The same things that cause the flexplate to crack can also cause transmission problems. The center of this spring steel flex plate is bolted to the rear crank shaft flange. As a result, this can cause the flexplate to wobble. Buy performance transmission flex plates at alligator performance. Pull lower pan,check rod movement,or remove bearing cap. Crack and a piece missing out of the flex plate visible from the. Dodge cummins bd precision dtt ats billet flex plates. Oem is the abbreviation for original equipment manufacturer. Usual failure mode is the crankcase bolts or the torque converter bolts work loose, allowing the parts to start moving in different directions, the clicking sound you heard. The piston looks too clean and there are what looks like the circular pattern of a valve impression on the top of the piston. May 26, 2004 a friend has had noise on his 93 ctd check flex plate hes cracked 2 in 150k other than that not sure my. As i was driving into work this morning i noticed a sound that seemed to come from the middle of the car.
The reason for the sound involves the flexplate s location and its function. Those factors ensure that when the engine starts and the driver puts it in drive, the cracked flexplate s movement will create a noise. Power loss at high speeds, the flexplate like most engine parts endures a considerable amount of strain and stress. Marble sounding noises that go away under load,can come from internal transmission,cracked flex plate,also called a flywheel. May 23, 2008 can a loose flex plate and torque converter on my 2007 dodge ram diesel cause engine damage over time. Merchandise thanks for tuning in we hope you guys and gals enjoy the video, be sure to follow us on social. The flex plate is what connects your engine to the torque converter, and the factory component is only meant to handle the output of the stock engine, not the high torque loads that can easily be produced by a modified. The sound is very similar to a bad connecting rod and is often misdiagnosed. Does the knock continue and get faster as the engine spins higher. All too often, we see shattered flex plates that will ruin your day at the track, camping, or wherever. The spacer plate that i mention, was listed on the website that the heavy duty sfi flexplate came from as a necessary add on came with longer dowel pins to compensate as due to that flexplate being double the thickness of stock, the company that made that particular flexplate said that this spacer was required to use with their flexplate to. Bad rattle flexplateconverter dodge cummins diesel forum. Furthermore, if not properly diagnosed it will occur again and often damage to the transmission may follow. A loose bolt on a flexplate or a crack between its bolt holes.
This video demonstrates the sound, diagnosis and solution to what sounded like a rod knocking on a 1999 toyota 4runner with a 3. Ah, well, this is the first real money ive put into keeping the old girl on the road. Those factors ensure that when the engine starts and the driver puts it in drive, the cracked flexplates movement will create a noise. Broken or loose bolts on the crankshaft end of the flexplate, or on the torque.
You wont tear the center section out of this billet flex plate. I would have picked her up today, but the shop got the wrong replacement flex plate shipped to them supplier had the wrong plate in the box. The sound is very similar to a bad engine rod and is often misdiagnosed. Broken or loose bolts on the crankshaft end of the flexplate, or on the torque converter side, missalign the flexplate, causing a high side of the plate to strike or rub against internal components. A cracked flex plate is almost always a sign of other problems. Listen for any rhythmic clunking or grinding noise while the engine idles in park or neutral, or idling in gear with a foot on the brake pedal. Arp 1472902 flexplate bolt kit prw 1835910 xtreme duty sfirated internal balance 152 teeth steel flexplate for dodge cummins 5. Ats performance ford powerstroke and dodge cummins. The factory stamped steel flex plate found on the 9407 dodge cummins automatic transmissions is inadequate for the capabilities of the engine to say the least. Symptoms of a cracked flexplate general discussion. If you have a knocking noise from your engine it might not be the engine itself.
The flex plate replaces the flywheel in automatic transmission cars. My cummins engine has a loud knock but because i change my own engine oil they do not want to cover under warranty. A guy i worked for in high school had a bronco ii with a broken flex plate, we were so sure it was a rod knock we. Listen for any rhythmic clunking or grinding noise while the engine idles in park or. While this is the more likely reason, pull out the starter and check the plate. Often times, modified engines can crack or even shatter the stock flex plate.
I check all the idlers and such, they all look good, sound is louder near the bellhousing. Can a loose flex plate and torque converter on my 2007 dodge. You will find that the lip around the outside of the flex plate bottoms against the outside rim of the torque converter. The classic and most obvious symptom of a cracked flexplate involves the sound it makes while the engine is running. Its not as futuristic as george jetsons trip that becomes a briefcase, but there are still some neat kitchen appliances nowadays. Dont confuse all of this with the sound of a bent or burned exhaust valve, a loose timing chain or a cracked flex plate, though, which can also make all sorts of ugly noises but wont be as rhythmic as that bad rod bearing.
Nonlock years 19891993 must have goerend billet cover. The unwary wont notice especially since it is so hard to see up in there. The reason for the sound involves the flexplates location and its function. The high torque of your cummins in conjunction with a betterdesigned torque converter can transfer the torque with no slip. The flex plate usually makes a tinny or clanging some times chirping sound while starting,shutting off, accelerating or decelerating. Can anyone help me figure out if this noise is just injector rattle or a cracked flexplate. The outer perimeter of the plate is attached by six bolts directly to the torque converter which in turn drives the transmission input. The bdpower 1041221 flex plate is specially designed to handle the torque and horsepower that your 2007. Flex disk goes on each end of the drive shaft, could only make noise if car was moving. The sun coast 618bfp billet flex plate for your 19942007 dodge 5. It bolts to the end of the crankshaft and the transmissions torque converter bolts to it. Noise under the hood can be very tricky,i use a device called engine ear,it helps me nail the location. P c industries supplies both genuine and oem replacement parts for cummins engines.
Our oem replacement parts carry a two year warranty and remanufactured parts carry a one year warranty. Diesel engine transmission torque converter flex plate. On the way home the other day, in traffic, heard a new noise. I have the back seats out so there isnt too much sound dampening back there, and i have been listening for any odd noises over the past few weeks. I hear that cummins is sayng some get bent in cold. And we also have heavyduty and sfiapproved flexplates for highhorsepower, highrpm race applications. I have seen on occasion the torque converter bolts get loose and. Get the best deals on cummins car and truck flywheels, flexplates and parts when you shop the largest online selection at. Fits cummins 6bt fits cummins 6bt 5 9l 12v 24v sfi dodge 2500 3500 flex plate flexplate new. Unlike the stock flex plate that can crack or even shatter, the hays flex plate can handle 1,500 lbs. Cummins flex plate oem, new and used auto parts for all. Cummins flex plate quality auto parts, new, used and. Cummins car and truck flywheels, flexplates and parts for. Weve got tough yet affordable flexplates for stock and mildly modified street vehicles.
Well, the tranny shop tells me that its a cracked flex plate. Constructed from a thick onepiece billet steel design, the hays flex plate is built to handle the additional horsepower and torque from your modified cummins. Inspect all bolts and flex plate by rotating that engine around, about the best first step you can do without pulling that tranny back. This leaves nearly a 14 inch gap between the mounting holes in the converter and the face of the flex plate. You might notice rhythmic clunking or grinding noises while the engine is running. This may sound very old school, but take a section of heater hose long enough to reach the motor while you stand along side. Descriptions of the sound include clanking, chirping and a light knocking. A misaligned flex plate can also keep the engine from running smoothly, which can lead to erratic changes in engine rpm. How to know if a flexplate is warped it still runs. The random stalling and rattling sound point to the flywheel flex plate being cracked or loose. Trucks an 06 2500 with efi by ryan, cai, intake horn, and 5 exhaust. Hopefully you caught it in time and can pull one bolt at a time out. The reason for needing a new flexplate is that the oem unit will eventually crack due to engine vibration and the inferior thickness of the hub, or center section of the part itself. Allot of trannies out there use a 2 piece design, but with our high torque starters turning over the cummins, we will see a fail rate above others.
Hope im not repeating an old thread but i couldnt find an existing one. I would focus on the flex plate,normally the crack is. Well, with the dodge cummins, one of the weakest links is the factory flex plate, but the bd flex plate can change all that. A few weeks ago i noticed a popping sound in the exhaust and intake. The first cracked fp for me i ignorantly assumed the missing torque converter bolt was the problem so i missed the bellhousing problem. As the horsepower and pulling weight of the truck increases, so does the strain on the flex plate that is why this flex plate is perfect for towing, daily driving, and drag racing. Customer experienced loud engine noise and our tech found a cracked flex plate from over tightened bolts. Those factors ensure that when the engine starts and the driver puts it in. When a flexplate cracks, it often produces a loud knocking noise as it rotates. Random rattling noise from bellhousing area the truck stop. There are tough flexplatesand there are chuck norriscaliber flexplates. Then whom ever replaced the fp before me didnt catch the peened bellhousing and tightened it down causing a alignment problem. Sep 12, 2017 can anyone help me figure out if this noise is just injector rattle or a cracked flexplate.
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